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Exhaust gas swirler - what is it and how does it work?

The flue gas swirler improves boiler efficiency by slowing down flue gas flow and increasing heat recovery. Installed in flue gas ducts, it reduces energy losses and fuel consumption. Recommended for retrofitting solid fuel boilers.

Exhaust gas swirler - what is it?

A flue gas swirler is a component of a heating system installed in the flue pipe or heat exchanger of a boiler. Its task is to slow down the flow of flue gases and force them to swirl. This keeps the hot gases in the heat exchange area longer, which increases the efficiency of the boiler and reduces energy losses.

Flue gas swirlers come in various forms - they can be spiral inserts, perforated plates or metal rods that change the path of flue gas movement. Their design depends on the type of boiler and the specifications of the heating system.

See Stalmark products.

How does the exhaust gas swirler work?

The operation of the swirler is based on increasing the turbulence of the exhaust gases. By default, exhaust gases move through a heat exchanger or chimney in a linear motion, causing much of the heat to be lost. The furnace flue gas swirler changes this flow, forcing the flue gases into a swirling motion. What does this do?

  1. Improved efficiency of the boiler - more heat is transferred to the exchanger, reducing fuel consumption.
  2. Reduction of heat loss - slower flue gas flow means better transfer of energy to the heating medium.
  3. Reduction of emissions - more thorough combustion reduces the amount of soot and harmful substances in the flue gas.

Exhaust gas swirler - is it worth using?

Investing in a furnace flue gas swirler can save real money in the long run. It is worth considering if:

  • You want to increase the efficiency of your boiler - especially for older models, where heat loss can be significant.
  • You care about fuel savings - better combustion efficiency means less use of wood, coal or pellets.
  • You have a problem with soot buildup in the chimney - the turbulence generated by the swirler can reduce the formation of carbon buildup.
  • You want to reduce exhaust emissions - less pollution is a benefit not only for the environment, but also for the life of the boiler.

**Remember that a flue gas swirler is not a universal solution. Its effectiveness depends on the boiler design, flue draught and combustion parameters. In some cases, its installation may require consultation with a specialist to avoid flue gas flow disturbances.

How to choose the right exhaust gas swirler?

Choosing the right model should take into account several key factors:

  • Type of boiler - not every stove will work with a given model of swirler.
  • Diameter of the flue - the device should fit the existing installation.
  • Material of construction - steel elements resistant to high temperatures work best.
  • Adjustability - some models allow you to adjust the intensity of the flue gas turbulence.

Flue gas swirler is an effective way to improve boiler efficiency and reduce heat loss. By forcing the swirl movement of flue gases, it allows more efficient transfer of energy to the heating system, resulting in fuel savings and lower emissions. To achieve the best results, it is advisable to consult an expert and tailor the solution to the specific needs of the heating system.

Ask an expert about the selection of a swirler

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